“We are urgently looking into the latest allegations and will take appropriate measures in accordance with our policies to prevent any cases of child labor in our suppliers,” Samsung said in a statement.

Samsung conducted audits in March and August 2013, and then again in June 2014, finding “no instances of child labor” at the 100 of its suppliers in China it surveyed, although it’s not clear whether Shinyang was included in any of those audits.

Shinyang makes cellphone covers and parts for Samsung, with China Labor Watch saying the company has hired 15 year olds that were using other people’s IDs. The teens were working for 11 hours a day, of which only 10 were paid. Furthermore, the underage workers were employed for three to six months, the watchdog revealed, saying that Samsung’s child labor monitoring systems are “ineffective.”